Flora of North America species comparison

petioles 20–50 mm;

blades rounded-deltate to ovate or lanceolate overall, (20–)30–70+ × (20–)30–60+ mm, (1–)2(–3)-pinnatisect, ultimate lobes obovate or lanceolate, 15–45+ × 10–25+ mm, bases truncate to cuneate, ultimate margins entire, sometimes ciliolate, apices rounded to acute or attenuate, faces usually glabrous, sometimes hirtellous.

(10–)20–50(–100) mm.

± campanulate, 5–7 × 3–4(–5) mm.

0 or 3–5+;

laminae yellowish or whitish, 1–2(–3) mm.

10–20(–30+);

corollas yellowish to whitish, 2–3 mm.

8–12, lanceolate to linear, 4–6 mm.

of (7–)8(–10) linear bractlets 3–5 mm, ± appressed, margins ciliate, abaxial faces usually glabrous.

usually borne singly, sometimes in ± corymbiform arrays.

red-brown, outer weakly obcompressed, 7–15 mm, inner ± 4-angled, linear to linear-fusiform, 12–18 mm, margins not ciliate, apices ± attenuate, faces 2-grooved, often tuberculate-hispidulous;

pappi of (2–)3–4, erect to divergent, retrorsely barbed awns 2–4 mm.

= 24, 72.